What are the Safari Experimental Features in iOS 11 Public Beta, and should I use them?

I

iMore Question

I’m using the 10.5 iPad Pro and noticed the Safari Experimental Features within the advanced settings for Safari. I tried doing a search to learn about them, but only verified that they exist. What are they and should I, as a non-developer (though an avid technologist and love trying new things), try out these features at all?
 

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